Laura Carlson is Associate Professor in Psychology at the University of Notre Dame. Her publications include journal articles published in Psychological Science, Journal of Experimental Psychology, and Journal of Memory and Language. Emile van der Zee is Principal Lecturer in Psychology at the University of Lincoln. His publications include the edited volumes (with Urpo Nikanne) Cognitive Interfaces : Constraints on Linking Cognitive Information (OUP 2000) and (with Jon Slack) Representing Direction in Language and Space (OUP 2002).